1:
2: # The LearningOnline Network with CAPA
3: # Handler to upload files into construction space
4: #
5: # $Id: lonupload.pm,v 1.33 2006/07/05 22:23:09 albertel Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: ###
30:
31: package Apache::lonupload;
32:
33: use strict;
34: use Apache::File;
35: use File::Copy;
36: use File::Basename;
37: use Apache::Constants qw(:common :http :methods);
38: use Apache::loncacc;
39: use Apache::loncommon();
40: use Apache::lonnet;
41: use HTML::Entities();
42: use Apache::lonlocal;
43: use Apache::lonnet;
44:
45: my $DEBUG=0;
46:
47: sub Debug {
48: # Put out the indicated message but only if DEBUG is true.
49: if ($DEBUG) {
50: my ($r,$message) = @_;
51: $r->log_reason($message);
52: }
53: }
54:
55: sub upfile_store {
56: my $r=shift;
57:
58: my $fname=$env{'form.upfile.filename'};
59: $fname=~s/\W//g;
60:
61: chomp($env{'form.upfile'});
62:
63: my $datatoken=$env{'user.name'}.'_'.$env{'user.domain'}.
64: '_upload_'.$fname.'_'.time.'_'.$$;
65: {
66: my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').
67: '/tmp/'.$datatoken.'.tmp');
68: print $fh $env{'form.upfile'};
69: }
70: return $datatoken;
71: }
72:
73:
74: sub phaseone {
75: my ($r,$fn,$uname,$udom,$mode)=@_;
76: my $action = '/adm/upload';
77: if ($mode eq 'testbank') {
78: $action = '/adm/testbank';
79: } elsif ($mode eq 'imsimport') {
80: $action = '/adm/imsimport';
81: }
82: $env{'form.upfile.filename'}=~s/\\/\//g;
83: $env{'form.upfile.filename'}=~s/^.*\/([^\/]+)$/$1/;
84: if ($env{'form.upfile.filename'}) {
85: $fn=~s/\/[^\/]+$//;
86: $fn=~s/([^\/])$/$1\//;
87: $fn.=$env{'form.upfile.filename'};
88: $fn=~s/^\///;
89: $fn=~s/(\/)+/\//g;
90:
91: # Fn is the full path to the destination filename.
92: #
93:
94: &Debug($r, "Filename for upload: $fn");
95: if (($fn) && ($fn!~/\/$/)) {
96: $r->print('<form action="'.$action.'" method="post" name="fileupload">'.
97: '<input type="hidden" name="phase" value="two" />'.
98: '<input type="hidden" name="datatoken" value="'.
99: &upfile_store.'" />'.
100: '<input type="hidden" name="uploaduname" value="'.$uname.
101: '" />'.&mt('Store uploaded file as ').
102: "<span class='LC_filename'>/priv/$uname/</span>".
103: '<input type="text" size="50" name="filename" value="'.$fn.
104: '" /><br />'.
105: '<br />'.&mt('Choose file type:').'
106: <select name="filetype">
107: <option value="standard" selected>'.&mt('Regular file').'
108: <option value="testbank">'.&mt('Testbank file').'
109: <option value="imsimport">'.&mt('IMS package').'
110: </select>'.&Apache::loncommon::help_open_topic("Uploading_File_Options").'
111: <br />
112: <br />
113: ');
114: $r->print('<input type="button" value="'.&mt('Store').'" onClick="javascript:verifyForm()"/></form>');
115: # Check for bad extension and warn user
116: if ($fn=~/\.(\w+)$/ &&
117: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
118: $r->print('<span class="LC_error">'.&mt('The extension on this file,').
119: ' "'.$1.'"'.&mt(', is reserved internally by LON-CAPA.').
120: ' <br />'.&mt('Please change the extension.').'</span>');
121: } elsif($fn=~/\.(\w+)$/ &&
122: !defined(&Apache::loncommon::fileembstyle($1))) {
123: $r->print('<span class="LC_error">'.&mt('The extension on this file,').
124: ' "'.$1.'"'.&mt(', is not recognized by LON-CAPA.').
125: ' <br />'.&mt('Please change the extension.').
126: '</span>');
127: }
128: } else {
129: $r->print('<span class="LC_error">'.&mt('Illegal filename.').'</span>');
130: }
131: } else {
132: $r->print('<span class="LC_error">'.&mt('No upload file specified.').'</span>');
133: }
134: }
135:
136: sub phasetwo {
137: my ($r,$tfn,$uname,$udom,$mode)=@_;
138: my $action = '/adm/upload';
139: my $returnflag = '';
140: if ($mode eq 'testbank') {
141: $action = '/adm/testbank';
142: } elsif ($mode eq 'imsimport') {
143: $action = '/adm/imsimport';
144: }
145: my $fn='/priv/'.$uname.'/'.$tfn;
146: $fn=~s/\/+/\//g;
147: &Debug($r, "Filename is ".$tfn);
148: if ($tfn) {
149: &Debug($r, "Filename for tfn = ".$tfn);
150: my $target='/home/'.$uname.'/public_html'.$tfn;
151: &Debug($r, "target -> ".$target);
152: # target is the full filesystem path of the destination file.
153: my $base = &File::Basename::basename($fn);
154: my $path = &File::Basename::dirname($fn);
155: $base = &HTML::Entities::encode($base,'<>&"');
156: my $url = $path."/".$base;
157: &Debug($r, "URL is now ".$url);
158: my $datatoken=$env{'form.datatoken'};
159: if (($fn) && ($datatoken)) {
160: if ((-e $target) && ($env{'form.override'} ne 'Yes')) {
161: $r->print('<form action="'.$action.'" method="post">'.
162: &mt('File').' <span class="LC_filename">'.$fn.'</span> '.
163: &mt('exists. Overwrite?').' '.
164: '<input type="hidden" name="phase" value="two" />'.
165: '<input type="hidden" name="filename" value="'."$url".'" />'.
166: '<input type="hidden" name="datatoken" value="'.$datatoken.'" />'.
167: '<input type="submit" name="override" value="'.&mt('Yes').'" /></form>');
168: } else {
169: my $source=$r->dir_config('lonDaemons').'/tmp/'.$datatoken.'.tmp';
170: my $dirpath=$path.'/';
171: $dirpath=~s/\/+/\//g;
172: # Check for bad extension and disallow upload
173: if ($fn=~/\.(\w+)$/ &&
174: (&Apache::loncommon::fileembstyle($1) eq 'hdn')) {
175: $r->print(&mt('File').' <span class="LC_filename">'.$fn.'</span> '.
176: &mt('could not be copied.').'<br />'.
177: '<span class="LC_error">'.
178: &mt('The extension on this file is reserved internally by LON-CAPA.').
179: '</span>');
180: $r->print('<br /><font size=+2><a href="'.$dirpath.'">'.
181: &mt('Back to Directory').'</a></font>');
182: } elsif ($fn=~/\.(\w+)$/ &&
183: !defined(&Apache::loncommon::fileembstyle($1))) {
184: $r->print(&mt('File').' <span class="LC_filename">'.$fn.'</span> '.
185: &mt('could not be copied.').'<br />'.
186: '<span class="LC_error">'.
187: &mt('The extension on this file is not recognized by LON-CAPA.').
188: '</span>');
189: $r->print('<br /><font size="+2"><a href="'.$dirpath.'">'.
190: &mt('Back to Directory').'</a></font>');
191: } elsif (-d $target) {
192: $r->print('File <span class="LC_filename">'.$fn.'</span> could not be copied.<br />'.
193: '<span class="LC_error">'.
194: &mt('The target is an existing directory.').
195: '</span><br />');
196: $r->print('<font size="+2"><a href="'.$dirpath.'">'.
197: &mt('Back to Directory').'</a></font>');
198: } elsif (copy($source,$target)) {
199: chmod(0660, $target); # Set permissions to rw-rw---.
200: if ($mode eq 'testbank' || $mode eq 'imsimport') {
201: $r->print(&mt("Your file - $fn - was uploaded successfully")."<br /><br />");
202: $returnflag = 'ok';
203: } else {
204: $r->print(&mt('File copied.'));
205: $r->print('<br /><font size="+2"><a href="'.$url.'">'.
206: &mt('View file').'</a></font>');
207: $r->print('<br /><font size="+2"><a href="'.$dirpath.'">'.
208: &mt('Back to Directory').'</a></font><br />');
209: }
210: } else {
211: $r->print('Failed to copy: '.$!);
212: $r->print('<br /><font size="+2"><a href="'.$path.'">'.
213: &mt('Back to Directory').'</a></font>');
214: }
215: }
216: } else {
217: $r->print('<span class="LC_error">'.
218: &mt('Please use browser "Back" button and pick a filename').
219: '</span><br />');
220: }
221: } else {
222: $r->print('<span class="LC_error">'.
223: &mt('Please use browser "Back" button and pick a filename').
224: '</span><br />>');
225: }
226: return $returnflag;
227: }
228:
229: # ---------------------------------------------------------------- Main Handler
230: sub handler {
231:
232: my $r=shift;
233:
234: my $uname;
235: my $udom;
236: my $javascript = '';
237: #
238: # phase two: re-attach user
239: #
240: if ($env{'form.uploaduname'}) {
241: $env{'form.filename'}='/priv/'.$env{'form.uploaduname'}.'/'.
242: $env{'form.filename'};
243: }
244:
245: unless ($env{'form.phase'} eq 'two') {
246: my %body_layout = ('rightmargin' => "0",
247: 'leftmargin' => "0",
248: 'marginwidth' => "0",
249: 'topmargin' => "0",
250: 'marginheight' => "0");
251: my $start_page =
252: &Apache::loncommon::start_page('Importing a Testbank file into LON-CAPA',
253: undef,
254: {'only_body' => 1,
255: 'add_entries' => \%body_layout,
256: 'js_ready' => 1,});
257: my $end_page =
258: &Apache::loncommon::end_page({'js_ready' => 1,});
259:
260: $javascript = qq|
261: function verifyForm() {
262: var mode = document.fileupload.filetype.options[document.fileupload.filetype.selectedIndex].value
263: if (mode == "testbank") {
264: document.fileupload.action = "/adm/testbank";
265: }
266: if (mode == "imsimport") {
267: document.fileupload.action = "/adm/imsimport";
268: }
269: if (mode == "standard") {
270: document.fileupload.action = "/adm/upload";
271: }
272: document.fileupload.submit();
273: }
274: |;
275: }
276: ($uname,$udom)=
277: &Apache::loncacc::constructaccess($env{'form.filename'},
278: $r->dir_config('lonDefDomain'));
279: unless (($uname) && ($udom)) {
280: $r->log_reason($uname.' at '.$udom.
281: ' trying to publish file '.$env{'form.filename'}.
282: ' - not authorized',
283: $r->filename);
284: return HTTP_NOT_ACCEPTABLE;
285: }
286:
287: my $fn;
288: if ($env{'form.filename'}) {
289: $fn=$env{'form.filename'};
290: $fn=~s/^http\:\/\/[^\/]+\///;
291: $fn=~s/^\///;
292: $fn=~s/(\~|priv\/)(\w+)//;
293: $fn=~s/\/+/\//g;
294: } else {
295: $r->log_reason($env{'user.name'}.' at '.$env{'user.domain'}.
296: ' unspecified filename for upload', $r->filename);
297: return HTTP_NOT_FOUND;
298: }
299:
300: # ----------------------------------------------------------- Start page output
301:
302:
303: &Apache::loncommon::content_type($r,'text/html');
304: $r->send_http_header;
305:
306: $javascript = "<script type=\"text/javascript\">\n//<!--\n".
307: $javascript."\n// --></script>\n";
308:
309: $r->print(&Apache::loncommon::start_page('Upload file to Construction Space',
310: $javascript));
311:
312: if (($uname ne $env{'user.name'}) || ($udom ne $env{'user.domain'})) {
313: $r->print('<h3><font color=red>'.&mt('Co-Author').': '.$uname.
314: &mt(' at ').$udom.'</font></h3>');
315: }
316:
317: if ($env{'form.phase'} eq 'two') {
318: &phasetwo($r,$fn,$uname,$udom);
319: } else {
320: &phaseone($r,$fn,$uname,$udom);
321: }
322:
323: $r->print(&Apache::loncommon::end_page());
324: return OK;
325: }
326:
327: 1;
328: __END__
329:
330: =head1 NAME
331:
332: Apache::lonupload - upload files into construction space
333:
334: =head1 SYNOPSIS
335:
336: Invoked by /etc/httpd/conf/srm.conf:
337:
338: <Location /adm/upload>
339: PerlAccessHandler Apache::lonacc
340: SetHandler perl-script
341: PerlHandler Apache::lonupload
342: ErrorDocument 403 /adm/login
343: ErrorDocument 404 /adm/notfound.html
344: ErrorDocument 406 /adm/unauthorized.html
345: ErrorDocument 500 /adm/errorhandler
346: </Location>
347:
348: =head1 INTRODUCTION
349:
350: This module uploads a file sitting on a client computer into
351: library server construction space.
352:
353: This is part of the LearningOnline Network with CAPA project
354: described at http://www.lon-capa.org.
355:
356: =head1 HANDLER SUBROUTINE
357:
358: This routine is called by Apache and mod_perl.
359:
360: =over 4
361:
362: =item *
363:
364: Initialize variables
365:
366: =item *
367:
368: Start page output
369:
370: =item *
371:
372: output relevant interface phase (phaseone or phasetwo)
373:
374: =item *
375:
376: (phase one is to specify upload file; phase two is to handle conditions
377: subsequent to specification--like overwriting an existing file)
378:
379: =back
380:
381: =head1 OTHER SUBROUTINES
382:
383: =over 4
384:
385: =item *
386:
387: phaseone() : Interface for specifying file to upload.
388:
389: =item *
390:
391: phasetwo() : Interface for handling post-conditions about uploading (such
392: as overwriting an existing file).
393:
394: =item *
395:
396: upfile_store() : Store contents of uploaded file into temporary space. Invoked
397: by phaseone subroutine.
398:
399: =back
400:
401: =cut
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